Update FluentAssertion

Author: linkdotnet

tests/Directory.Build.props

@@ -3,7 +3,7 @@
 
   <ItemGroup Condition="$(MSBuildProjectName) != 'LinkDotNet.Blog.TestUtilities'">
     <PackageReference Include="bunit" Version="1.4.15" />
-    <PackageReference Include="FluentAssertions" Version="6.5.0" />
+    <PackageReference Include="FluentAssertions" Version="6.5.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0-preview-20220131-20" />
     <PackageReference Include="Moq" Version="4.16.1" />
     <PackageReference Include="xunit" Version="2.4.2-pre.12" />